Cathead attachment for drilling engines



Feb. 23 1926.

' 1,574,313 s. v. STEWART ET AL CATHEAD ATTACHMENT FOR DRILLING ENGINESFiled April 15, 1925 Patented Feb. 23, 1926.

imiree stares PATENT Fries.

SIDNEY V. STEWART, F COREY, PENNSYLVANIA, AND EDWARD TIMES, OLE" LGSAIQ'GELES, CALZFDRNIA, ASSIGNQRS OF ONE-HALF TO UNION TOGL COMPANY, OFTORRANCE, CALIFORNIA, A COR'PQRATION ()F CALIFORNIA, AND ONE-HALF T0AJAX IRON WQB/KS, OF COR-RY, PENNSYLVANIA, A CORPORATION OF. PENNSYL-vnnrn.

CATHEAD ATTACHMENT FOR DRILLING ENGINES.

Application filed April 15, 1925.

To all whom it may concern:

Be it known that we, SIDNEY V. S'risw nr and lilow xnn 'liMns, bothcitizens of the limited States, residing at Corry, county of Eric, Stateof Pennsylvania, and at Los Angeles, county of Los Angeles, StateofCalifornia, respectively, have invented a new and useful CatheadAttachment for Drilling Engines, ofwhich the following is aspecification.

This invention relates to steam drilling engines such as are employed inassembling the necessary equipment preparatory to rig ging up an oilwell and derrick. In conducting this operatiom it is necessary to moveparts of this equipment around; these parts are often very heavy andthis entails considerable labor andtime. The general object of thisinvention is to provide an attachment forthe regular type of twincyiinder engine which is generally employed for this purpose in oiliields,.which attachment carries a cat-head or winding spool on which acable can be carried topull heavy machine parts along on skids, or toassist in hoisting parts of the apparatus or. the derrick. One, of theobjects of the invention is to provide a construction which -will enablea slight change in the construction of the engine to adapt it for ourpur poses.

Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combination of parts to bedescribed hereinafter, all of which contribute to produce an efficientcat-head attachment for drilling engines.

i A preferred embodiment of the invention is described in the followingspecification, while the broad scope of the invention is pointed out inthe appended claims.-

In the drawings:

Fig. 1 is a plan of the crank shaft end of a twin-cylinder drillingengine of the type referred to, parts of the engine and engine-bed beingbroken away.

Fig. 2 is an elevation of this end of the engine viewed from the leftend of Fig. 1

Serial No. 23,434.

and with the bed and parts of the engine broken away. i

Fig. Bis a vertical sectiontaken about on the line 33 of Fig. 2.

In practicing our invention, we provide the engine frame with anoutboard pillowblock or pedestal bearing which is attached to the sideof the engine frame, and this hearing is in alignment with the tworegular bearings for the engine shaft. We also provide an engine shaftwith air'outboard journal received in the. outboard bearing, and with aneck projecting beyond the outboard bearing. ()n this neck, the windingspool or cat-head is secured. Inaddition to securing thepedestal bearingto the en gine frame, we also support it on the engine bed and secure itto the engine bed by holding-down bolts. The pillow block is a separateand distinct part from the engine frame.

Referring to the drawing, this type of en gine includes a frame 1 withtwo oppositely disposed aligning bearings 2.

The engines of this type are provided with two disc cranks such asthedisc crank 23 shown atthe right in Fig. 1, each crank carrying aconnecting rod 4. Between the bearings eccentrics 5 are placed, andbetween the eccentrics a sprocket wheel 6 is provided on the shaft. Inadapting this engine to our purpose, we provide a crank 7 011 a shaft 7which is received in the main bearings 2 in the usual way, but on theside of the engine where the cat-head attachment is to be placed, weprovide the shaft with a journal 8 in alignment with. the axes of thebearings 2.

On the side of the frame 1 adjacent to this journal 8, and below thecrank 7 we provide a pad or seat 9 (see Fig. 3) and on this pad wesecure a pillow-block or pedestal bearing 10. The pedestal bearing issecured in place of bolts 11. The upper part of this pedestal bearingreceives the journal 8 as indicated in Fig. 3. In order to insure thatthe bore 10 of the bearing which receives the journal 8 will alignproperly with the main bearings 2, we provide dowel pins 12 whichproject from the side of the pedestal bearing so as to'make a machinefit in drilled openings 13 in the face of the pad.

Beyond the journal 8 the shaft 7 has an extension or neck 1% on which acat-head 15 is secured. In the present instance this cat-head is securedon the shaft by the key 16.

In Winding a cable around the cat-head, considerable strain is developedin a horizontal direction, and in order to meet this strain, we provideholding-down bolts 17 in the engine bed 18 which pass through an outerflange 19 projecting from the pillow-block.

The under face 20 of the pillow-block is in line with the under face 21of the engine frame, and both of these faces rest on the upper face ofthe engine bed, the e gine frame being secured to the bed by suitableholding-down bolts 22.

In connection with the'securing of the pedestal bearing, it should benoted that the means for securing it includes bolts extending in twodifferent planes sulistantially at right angles to each other, and thisresults in producing a very secure fastening.

The crank 7 which carries the connecting rod 41- adjacent to the pill-owblock 10 is provided with the counter-balance Q3.

What we claim is j 1 1. In a cathead attachment for a steam drillingengine, the'combination of an engine frame having a pair of aligningbearings, a crank-shaft carried in the bearings, with a crank at thesideof the frame, a pillow-block constituting a part distinct from the frameof the engine and bolted to the side of the engine-frame below saidcrank, said pillow-block having an outboard bearing aligning with thefirst named bear- March 1925.

ings and receiving the end of said shaft adjacent the said crank, saidshaft having a neck projecting beyond the outboard bearing, and acat-head carried on the neck.

2.- In a cat-head attachment for a steam drilling engine, thecombination of an engine bed, an engine-frame bolted to the bed andhaving a pair of aligning bearings, a crank-shaft carried in thebearings, with a crank at the side of the frame, a pillowblock bolted tothe engine bed. constituting a part distinct from the frame of theengine and bolted to the side of the engine-frame below said crank, saidpillow-block having an outboardbearing aligning with the first namedbearings and receiving the end of said shaft adjacent the said crank,said shaft havinga neck projecting beyond the outboard bearing, and acat-head carried on the neck.

3. In a cat-head attachment for a steam drilling engine, the combinationof an engine frame having a pair of aligning bearings and having a padformed on the outer side of the frame adjacent the bearings, apillowblock constituting apart distinct from the frame of the enginebolted to the engine frame at said pad, said pillow-block having anoutboard bearing, dowel pins carried. by the pillow-block and receivedin the engine frame at said pad to align the outboard bearing-with thefirst named bearings, an engine bed, bolts securing the engine frame andthe pillow-block to the engine bed, a crank shaft rotatably mounted inthe said bearings andhaving a neck extending beyond the saidoutboardbearing, and a. cathead attached to said neck.

Signed at Torrance, Calif, this3rd day of EDWARD TIMES. SIDNEY V.STEIVART.

